Twisting machines for heavy bobbins for the collection of twisted yarn



` Dec. w70 MT5 3,543,502

M. R TWISTING MACHINES FOR HEAVY BOBBINS FOR THE COLLECTION 0F TWISTEDYARN Filed July 22, 1968 2 Sheets-Sheet l Tmusniunmf I' BY v- (7MATTORNEYS @u L M. mwa 3543,50

TWISTING MACHINES FOR HEAVY BOBBINS FOR THE COLLECTION OF TWISTED YARNFiled July 22, 1968 2 Sheets-Sheet 2 t INVENTOR F ggg, 3

M/ @Ha E z@ f/ mf VM ATTORNEYS United States Patent O U.S. Cl. 57-62 3Claims ABSTRACT OF THE DISCLOSURE A twisting machine for heavy bobbinsincludes a dragging roller for each bobbin, the bobbins restingperipherally by gravity against the dragging rollers. Each bobbin ismounted for vertical swinging movement about an axis disposed beneaththe bobbin, so that the axis of rotation of the bobbin and the axis ofvertical swinging movement of the bobbin define a plane which occupies amore upright position when the bobbin is larger than when the bobbin issmaller. In this way, the heavier the bobbin, the less directly it bearsagainst the dragging roller, so that the pressure exerted by the bobbinon the dragging roller tends to be constant.

The present invention relates to a twisting machine for heavy bobbins,distaffs or the like for collecting twisted yarn which differs from theconventional twisting machines with superposed planes for the particulardisposition of its main components, namely: the twisting spindles, thecontrol and auxiliary members and the collection bobbins.

It is well known in the art of yarn twisting that the gradual increasein weight of the collecting means or bobbins, the high productivity andthe functional economy required in our days have led to the constructionof twisting machines with planes which the designers try to reduce moreand more in number with respect to the conventional machines in the aimof saving time and labour, Nevertheless, for charging and dischargingthe collection bobbins the machine operators are bound, up to now, toperform a heavy and tiresome displacement of said bobbins in verticaldirection.

The bobbins used at present have such a considerable weight and arewound up at such a winding speed that the men or women operators chargeand discharge said bobbins in a most tiresome as well as irrational wayusually with the aid of boards, stepladder or similar means.

By way of example, sufce it to mention that, at present, low twistingoperations on yarn of average numbering (about 100 deniers) areperformed at a winding speed of about 180 meters per minute, employingbobbins with a weight of 2700 kg. each.

It is expected that these figures will keep increasing in the future.

Since the quantity of yarn for each twisting charge amounts to 430 kg.and the weight of the empty bobbins to about 160 kg. it results that theweight to be lifted every 12 hours is about 590 kg.

Such a heavy work which is to -be performed daily is inadmissible muchthe more so as the charge and discharge operations can be effected onlyfrom very uncomfortable and completely irrational positions.

The twisting machine of the present invention eliminates all the abovementioned disadvantages and is so designed as to allow for rational andeasy charge and discharge operations.

Said twisting machine is characterized in that it has a single plane andcomprises a fore half portion and a back half portion completely equaland symmetrical to 3,543,502 Patented Dec. l, 1970 each other which aredisposed side by side, each half portion being formed by:

A lower zone having at least two rows of spindles disposed therein whichare preferably not alined but offset i.e. staggered with respect to eachother and are provided with their relative twisting means;

An intermediate zone having all the control and auxiliary members suchas the overfeeding and oiling devices preferably alined along a singlerow; an upper zone having the bobbins for the collection of the twistedyarn alined on at least two preferably offset rows, said bobbins beingmounted on supports which permit keeping constant the pressure exertedby said bobbins on the relative dragging rollers even as the weight onsaid bobbins keeps increasing.

All the above mentioned components of all said three zones being placedat such a height from the floor that they may be readily operated by thearm of a person of average tallness who stays upright.

To make the invention better understood reference is made hereinafter tothe accompanying drawings which diagrammatically show the disposition ofthe various twisting means according to the present invention.

In the drawings:

FIG. 1 is a front view of the fore half portion.

FIG. 2 is the incomplete plan view on FIG. l.

FIG. 3 is the cross section through the fore portion shown in FIG. l.

The illustrated twisting machine comprises: a fore half portion as shownin FIG. 1 and a back half portion (non-represented) equal andsymmetrical thereto and adapted to be placed side by side.

The fore half portion comprises: a lower zone 1 (FIG. l) having at leasttwo rows of spindles 10-10" staggered or offset with respect to eachother (as also shown in FIG. 2) in order to facilitate the access to theback spindles 10. Each spindle is provided at its upper portion with adevice 13 associated thereto to cooperate in the twisting process.

As also visible in FIG. 3 the intermediate zone 2 (FIG. l) comprises allthe control means and auxiliary means, such as the overfeeding devices 9and the oiling devices 8, all alined along a single row.

The upper zone 3 (FIG. l) comprises two preferably staggered or offsetrows of bobbins 4 and 4 for the collection of the twisteed yarn, saidbobbins being mounted on the supports 5, 14, 7, 17 which are so designedas to allow to keep constant the pressure exerted by said bobbins 4 and4' on the dragging rollers 6` associated thereto even as the weight ofsaid bobbins increases. This effect will be better explained in thefollowing.

As illustrated, it appears at once that, contrarily to the conventionaltwisting machines, passing from the twisting to the collection the yarnmoves upwards so that the operator charging the machine has to place thefull and therefore heavy spindles in a low position and the still emptyand therefore very light bobbins 4 in a high position, the charging workbeing therefore in both cases reduced as much as possible.

During the twisting process the weight of the yarn is lifted by themachine from the low zone 1 to the high zone 3.

lFor the discharge operations the heavy bobbins 4 are carried by theoperator downwards (and not upwards as in the conventional machines)whereby the work is again reduced as much as possible.

To further facilitate the charging and discharging work all the devicesand means are placed in such positions as to be easily reached by aperson of average tallness standing upright and rotating his or her armin an easy way.

Furthermore, the offset or staggered disposition of the spindles in thelower zone consents to have a great number of spindles within a smallarea without impairing their accessibility and also avoiding the dangerof having the bobbins `4 soiled with the oil dropping from the spindles,as it happens in the conventional machines.

The control and auxiliary members disposed in the intermediate zone 2,being the only ones which are not at all influenced by the dimensions ofthe bobbins 4, they have been arranged along a single row to permit easyvisual control from the front portion of the machine.

A further important feature of the twisting machine according to thepresent invention consists in the supporting means for the bobbins 4,these supports being illustrated in FIG. 3. Each of said supportingmeans is formed by two head portions 5 and 14 ('FIG. l) connected toeach other by parallel pins: a lower pin 7 pivoted to the machine frame18 and an upper pin 17 adapted to receive the bobbin 4.

The position of the two pins or pivots is such that when the bobbin isempty (see the dotted line 4" in FIG. 3) and weighs on the draggingroller 6, the plane passing through the two pivots 7-17 is inclined withrespect to the normal or vertical plane. On the contrary, when thebobbin increases in volume (4' of FIG. 3) said plane tends to reach avertical position so that the bobbin weighs less on the dragging roller6.

The pressure exerted by the bobbin 43 on the dragging roller 6 istherefore constant and independent from its weight. It results that thewound up bobbin has a very constant compactness, a better form and abetter capability of resisting to the damages to which it often incursduring its transportation.

From the foregoing it clearly appears that the twisting machine of theinvention is very rationally designed in all its details and is apt toreduce to a minimum the labour for the operators.

What is claimed is:

1. A twisting machine for heavy bobbins, distais and the like for thecollection of twisted yarn, characterized in that it has a single planeand comprises a fore half portion and a back half portion equal andsymmetrical to each other which are disposed side by side, each halfportion being formed by:

a lower zone (l) having at least two rows of spindles disposed thereinwhich are provided each with a twisting ring;

an intermediate zone (2) having overfeeding and oiling devices alined ina single row;

an upper zone (3) having bobbins for the collection of the twisted yarnalined in at least two rows,

dragging rollers that bear against said bobbins; said bobbins beingmounted on supports which are pivoted so as to keep constant by gravitythe pressure exerted by said bobbins on said dragging rollers even asthe weight of said bobbins keeps increasing;

and furthermore characterized in that all the abovementioned componentsof all the three said zones are at such a height that they may bereadily operated by a person of average height standing before them.

2. The twisting machine as claimed in claim 1, characterized in thateach of said supports for the bobbin comprises a frame formed by twohead portions connected to each other by two parallel pins, a lower pinpivoted to the frame of the twisting machine and an upper pin adapted toreceive the bobbin; the position of the two pins being such that whenthe bobbin is empty and rests on the dragging roller the plane passingthrough the two pivots is inclined with respect to the vertical plane,While when the bobbin is increasing in volume and weight, said planetends to reach a vertical position So that the bobbin bears lessdirectly on the dragging roller.

3. A twisting machine for heavy bobbins, comprising a plurality ofbobbins, a dragging roller for each bobbin and against which the bobbinbears peripherally, and means mounting the bobbins for bodily verticalswinging movement about a horizontal axis that defines with the bobbinaxis a plane which is more nearly vertical when the bobbin is large andrelatively heavy than when the bobbin is small and relatively light,whereby the bobbin bears against the dragging roller by gravity more orless directly according to the size and weight of the bobbin thereby tokeep substantially constant the pressure exerted by the bobbin againstthe dragging roller.

References Cited UNITED STATES PATENTS 2,318,162 5/1943 Jones et al.57-62 3,478,504 ll/l969 Nimtz et al 57--62 XR 1,467,457 9/ 1923 Sullivanet al. 57--136 2,021,031 11/1935 Swanson 242-18 XR 2,150,951 3/1939Toole et al. 242-18 2,158,611 5/1939 Gordon 57-136 2,249,404 7/ 1941Sunderland 57-59 2,743,061 4/ 1956 Kingsbury 242-18 3,430,875 3/ 1969Kieronski 242-18 3,441,231 4/ 1969 Siegel 242-18 XR DONALD E. WATKINS,Primary Examiner U.S. Cl. X.R. 242-18

